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Date: Sun, 3 May 2015 16:15:06 +0000 (UTC)
From: "Alan Boudreault (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
Message-ID: <JIRA.12820148.1428688917000.65251.1430669706487@Atlassian.JIRA>
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Subject: [jira] [Commented] (CASSANDRA-9171) Add deletions to paging dtests
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    [ https://issues.apache.org/jira/browse/CASSANDRA-9171?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14525891#comment-14525891 ] 

Alan Boudreault commented on CASSANDRA-9171:
--------------------------------------------

Tentative PR for these new tests: https://github.com/riptano/cassandra-dtest/pull/253

I have an issue with the last test (test_failure_threshold_deletions), not sure why yet... will investigate more tomorrow. Here's the traceback: 

{code}
aboudreault@kovarro:~/git/cstar/cassandra-dtest$ nosetests paging_test.py:TestPagingWithDeletions.test_failure_threshold_deletions
E
======================================================================
ERROR: test_failure_threshold_deletions (paging_test.TestPagingWithDeletions)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/aboudreault/git/cstar/cassandra-dtest/paging_test.py", line 1255, in test_failure_threshold_deletions
    NoHostAvailable, self.check_all_paging_results, [], 0, []
  File "/usr/lib/python2.7/unittest/case.py", line 475, in assertRaises
    callableObj(*args, **kwargs)
  File "/home/aboudreault/git/cstar/cassandra-dtest/paging_test.py", line 998, in check_all_paging_results
    pf = self.get_page_fetcher()
  File "/home/aboudreault/git/cstar/cassandra-dtest/paging_test.py", line 989, in get_page_fetcher
    return PageFetcher(future)
  File "/home/aboudreault/git/cstar/cassandra-dtest/paging_test.py", line 57, in __init__
    self.wait(seconds=30)
  File "/home/aboudreault/git/cstar/cassandra-dtest/paging_test.py", line 117, in wait
    raise RuntimeError("Requested pages were not delivered before timeout.")
RuntimeError: Requested pages were not delivered before timeout.
-------------------- >> begin captured logging << --------------------
dtest: DEBUG: cluster ccm directory: /tmp/dtest-QEhCUV
cassandra.cluster: ERROR: Unexpected exception while handling result in ResponseFuture:
Traceback (most recent call last):
  File "/home/aboudreault/git/cstar/python-driver/cassandra/cluster.py", line 2807, in _set_result
    self._set_final_exception(response.to_exception())
  File "/home/aboudreault/git/cstar/python-driver/cassandra/cluster.py", line 2901, in _set_final_exception
    fn(response, *args, **kwargs)
  File "/home/aboudreault/git/cstar/cassandra-dtest/paging_test.py", line 75, in handle_error
    raise exc
ReadTimeout: code=1200 [Coordinator node timed out waiting for replica nodes' responses] message="Operation timed out - received only 0 responses." info={'received_responses': 0, 'required_responses': 2, 'consistency': 'ALL'}
cassandra.connection: ERROR: Callback handler errored, ignoring:
Traceback (most recent call last):
  File "/home/aboudreault/git/cstar/python-driver/cassandra/connection.py", line 446, in process_msg
    callback(response)
  File "/home/aboudreault/git/cstar/python-driver/cassandra/cluster.py", line 2832, in _set_result
    self._set_final_exception(exc)
  File "/home/aboudreault/git/cstar/python-driver/cassandra/cluster.py", line 2901, in _set_final_exception
    fn(response, *args, **kwargs)
  File "/home/aboudreault/git/cstar/cassandra-dtest/paging_test.py", line 75, in handle_error
    raise exc
ReadTimeout: code=1200 [Coordinator node timed out waiting for replica nodes' responses] message="Operation timed out - received only 0 responses." info={'received_responses': 0, 'required_responses': 2, 'consistency': 'ALL'}
--------------------- >> end captured logging << ---------------------
{/code}

The code fails even with a higher timeout (tried 90,200...). at this line: self.wait(seconds=30) 

> Add deletions to paging dtests
> ------------------------------
>
>                 Key: CASSANDRA-9171
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9171
>             Project: Cassandra
>          Issue Type: Test
>          Components: Tests
>            Reporter: Tyler Hobbs
>            Assignee: Alan Boudreault
>              Labels: retrospective_generated
>
> Deletions can easily impact paging (see CASSANDRA-8490 for an example).  We should improve the paging dtests to include various kinds of deletions: partition-level, row-level, and cell-level.  The tests should also exercise deleting enough contiguous partitions/rows/levels to fill an entire page.
> Assigning to [~rhatch] for now since he created the original paging tests, but I can reassign this if needed.


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